When the forklift enters a formal working condition, it is necessary to periodically perform maintenance inspections for the forklift. In the inspection process, timely repair or replacement of worn parts is a very important and meticulous task. If the parts that should not be repaired are changed, it will cause waste. The replacement of the repaired parts does not affect the performance of the forklift, and it cannot guarantee the repair quality. Therefore, determining a wear limit standard for various parts as a basis for judging whether or not it should be replaced is a key issue. However, the decision of whether or not a part should be repaired cannot be based solely on the dimensional accuracy, surface roughness or form-position error of the part. It is also necessary to consider the effect of the degree of wear of the part on the overall performance of the forklift. So how to determine the degree of wear of the parts?
1. Although the wear degree of general parts has exceeded the tolerance, but does not exceed the second-level matching tolerance, it can continue to be used.
2. The parts cannot complete the intended use function due to wear, such as the loss of power transmitted by the clutch, the hydraulic parts cannot reach the predetermined pressure, and the cam valve system cannot maintain the predetermined movement law. If the above situation occurs, it must be replaced or repaired. .
3, the impact on performance and operating mechanism: After some parts wear, although it can also complete the use of functions, but reduced performance, such as the transmission gear can still transmit the predetermined torque and speed, but because the gap is too large, Increased noise, reduced efficiency, and disrupted smoothness of transmission must be determined by repair or replacement based on the degree of wear.
4, the impact on efficiency: When the parts wear, it will lead to reduced efficiency. If parts such as cylinders are worn out, the efficiency of the engine will be affected. It is necessary to decide whether or not to replace certain parts according to the specific conditions of wear.
5. The economics of the parts repair method: under the premise of ensuring the repair quality, the ratio of the repair cost to the repaired service life is lower than the ratio of the manufacturing (or outsourcing) cost of the new parts after replacement and the service life of the new parts after replacement. .
6. According to the forklift maintenance process, whether to repair or replace is determined by whether it has the technological capability and conditions for repairing worn parts.
Fluorocrystalline mica, also known as fluorphlogopite mica, synthetic mica, artificial mica, synthetic mica crystal, belongs to the silicate type artificial mica crystal, is under the high temperature condition of 1500°C, through strict process conditions and material ratio, in platinum The mica crystals smelted in the yttrium have a chemical formula of KMg3(AISi3O10)F2(OH)-, and do not contain (OH)-. The (OH)-hydroxyl group is replaced by F-(fluoro), which is similar to the fluorite mica. Materials commonly used in the general industry are natural mica. Natural mica is an underground ore naturally formed and belongs to the class of silicates. Most of the industrial mica used is phlogopite (brown) and muscovite. Its ideal chemical formula is KAI2(AISi3O10)(OH)2. OH)-(Hydroxy), due to the presence of hydroxyl (water molecules), its performance in all aspects is far lower than that of fluorocrystalline mica.
The main characteristics of fluoride crystal mica:
1, high temperature: can work long-term in the 1100 °C environment.
The testing department of the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences (nationally recognized testing institute) tested the thermal weight loss of 8% at 1100°C for 48 hours, and the melting and devitrification temperature was 1375°C.
2. Electrical insulation: The volume resistivity is 10 times higher than natural mica. Electrical breakdown strength is PTFE
Lean 10 times.
3, hot and cold blasting stability is very good
5 cycles of -40°C~70°C at the 5th Saibao Lab of the Ministry of Information Industry
Inspection, all qualified.
4, anti-corrosion:
Fluorophlogopite does not react with acid and alkali solutions, and does not react with water. Under the long-term (2 to 3 years) scouring of high-temperature and high-pressure water (including acid and alkali), the original clarity and transparency can still be maintained.
5, high frequency performance:
The dielectric constant of fluorite mica is 4.6 ε, and the dielectric loss is (1~4)×10 −4 tg δ, and the dielectric loss is very low. And because of the pure texture, all parameters are extremely stable.
6, optical properties
Since the fluorite mica contains less impurities, its light transmittance is compared from infrared to ultraviolet.
High, the transmittance is close to 100%.
7, Mosaic (Mosaicity):
The Mosaicite of fluorocrystalline mica is less than 0.25 degrees, which was produced in the experiment.
The neutron flame is not high enough to absorb multi-band light beams and is an ideal neutron monochromator test material.
8, vacuum deflation performance:
The evaporative volume of fluorite mica is low, and it is measured with a mass spectrometer and the trace gas released is only
O2, N2, Ar and other adsorbed gases. Since the H2O vapor is not released, this is extremely valuable for use as an electrical vacuum insulation material, which can greatly increase the service life of the vacuum device.
9, excellent physical properties:
Fluorocrystalline mica has atomicity flatness, transparency, separability and elasticity, not aging
It is not brittle and so on.
Due to the high temperature resistance, corrosion resistance, low frequency loss, and high bulk resistivity
Absorb multi-band light beam, excellent light transmittance and other advantages. Therefore it has become an ideal new material in the high-end area.
Fluorocrystalline mica Available in:
In the range of 180mm×53mm or ∮76mm, it can be processed into various shapes according to user requirements. Thickness within the range of 0.02mm~1.0mm can be allocated according to user requirements. The conventional thickness is 0.04~0.2mm.
Fluorine crystal (fluorphlogopite, artificial mica) mica film for observation window of high pressure boiler water level gauge in thermal power plant
Fluorophlogopite Mica,Fluorophlogopite Sheet,Synthetic Fluorophlogopite Mica,Fluorophlogopite Mica Fragments
Changchun City Taiyuan FluorphlogopiteCo. Ltd. , https://www.micaslice.com